Cutter-guard.



P. ERIGKSON.

CUTTER GUARD.

APPLIOATION FILED 0073.7, 1912.

Patented Oct. 7, 1913.

2 SHEETS-SHEET 1.

W INVENTOR Attorney COLUMBIA PLANOORAPN C P. ER'IGKSON.

CUTTER GUARD.

APPLICATION FILED 0013.7, 1912.

1,074,614. Patented Oct. 7, 1913.

2 SHEETS-SHEET}. N

WITNESSES INVENTOR- TED STATES ,PATEN T FFTCE.

PETER, ERICKSON, OF CHICAGO, ILLINOIS.

CUTTER-GUARD.

Specification of Letters Patent.

Patented Oct. 7,1913.

The object of the invention is to provide a guard of the kind stated which can be easily attached to the machine without altering the structure thereof, and which can be readily placed in operative position, and swung out of the way when not in use. The guard is also so constructed that'it holds the work firmly against the table. These objects are attained by a novel combination and arrangement of parts to be hereinafter described and claimed, reference being had to the accompanying drawings, in which- Figure 1 is an elevation of the guard,

partly broken away, in operative position.

Fig. 2 is a plan View of the guard. Fig. 3

is a longitudinal section on the line 3-3 of Fig. 2. Fig. 4: is a cross section on the line 1 1 of Fig. 2. Fig. 5 is a horizontal section on the line 55 of Fig. 1. Fig. 6 is a bottom plan view of the supporting bracket of the guard. Fig. 7 is a perspective view' of the cam to be hereinafter described.

In the drawings, 10 denotes the work table of a shaper or other wood-working machine having a vertical cutter-head 11 armed with knives 12 which operate above the table in the ordinary manner. The guard for protecting the operators hands from being injured by the knives comprises a plate'13 which surrounds the cutter-head, said plate having a central opening 14 in which the cutter-head works. The operators hands therefore cannot accidentally come in contact with the knives, and proper protection is afforded. The guard also serves to hold the work firmly on the table 10,.and it is carried by the outer end of a horizontally extending arm 15 located above the table 10, and supported in a manner to be presently described. A bolt 16 and a wing-nut 17 adjustably secure the guard to the supporting arm thereof. 7

To the under side of the table 10, near one edge thereof, is bolted or otherwise rigidly secured a bracket 18 having at one end a;

depending portion 19 to which is pivoted a socket member 20 which latter supports a standard 21. The socket-member has two lugs or ears 22 between which the part 19 extends, and in the opposite side edges of the latter are apertures in which seat pivot screws 23 carried by the lugs, whereby the pivotal connection between the part 19 and the socket-member is had.

The standard 21 is angular in cross-section, except its lower portion which passes into the socket of the member 20, and it is held in place therein by side and bottom screws 24. The socket-member is located slightly beyond the edge of the table 10 so that the standard may clear the same, and the latter rises a suitable distance above the level of the table.

Above the table 10, the standard 21 carries a clamping member 25 for holding the standard in upright position. This member is held in place on the standard by a set screw 26. The member 25 is so located that the table is between the same and the bracket 18, in which latter is an aperture which registers with an aperture in the table.

above the member 25, and said end is threaded to receive a nut 30 which screws down on said member. The upper end of the bolt is provided with a suitable handle bar 30* which passes through a transverse aperture therein.

On the standard 21, above the member 25, is adjust-ably mounted a support for the arm 15, said support comprising a top 31, and abottom 32 connected at each end by laterally spaced webs 33 between which latter and between the top and bottom, the inner end of the arm extends, said end of the arm being slotted lengthwise, as indicated at 34 so that it may straddle the standard. Beneath the top 31, the top of the arm is engaged by a clamping plate 35 which latter has on its under side a boss 36 which fits in the slot 34., and has a threaded aperture to receive a bolt 37 passing upward through an aperture in the bot-tom 32 and through the slot 34. Around the bolt, between the boss 36 and the bottom 32, is coiled a spring 38. The head 39 of the bolt engages theunder side of the bottom 32 and carries a transverse handle bar 40. Upon tightening up. the bo-lt,. the arm 15 is clamped between the plate 35 and the bottom 32. up the plate 35 when the arm 15 is removed for the purpose of changing the same.

From the top 31 rises a boss 41 having a vertical aperture to receive the standard 21 and in the bottom 32, in line with said aperture, is an aperture through which the standard also passes; The aperture in the boss 41 is large enough to accommodate a longitudinal key 42 which is loose and is adapted to be jammed against one side of the standard by means of a cam=43mounted in a transverse opening in the boss 41', said opening intersecting the aperture. One end of the cam has a lever-arm &4, whereby the-cam may be rocked. The cam is in contact with the key and when it is rocked in one direction, the key is jammed tightly against the standard 21, whereby the supporting memberiofi the arm 15 is rigidly held in place on the standard. Upon rocking the cam. in the opposite direction, the supporting member is released, and it can then be shifted up or down on the standard tolocate the arm 15 and the guard 13 the desired distance above the table 10. T he cam ld is operated by'a rod'4c5 connected to the lever-arm 4' 1 and supported at its free end by a fork 46 mounted on the top 131. A grip -17 is screwed on the rod 45 against the fork, so that by' turning said grip, the rod is drawn forward or hacked to operate the cam. The fork and grip serve to lock the camin clamping position.

To the upper end of the standard 21, in axial alinement therewith, is secured a rod 18 on-which is slidably mounted a sleeve 49. The upper end of the sleeve49 carries a projecting pin or abutment 50 and from the bottom of the sleeveextends a pin 51 which seats in an aperture in the topof the standard 21, said pin 51 serving'to hold the sleeve against rotation on the rod 48'. Abovethe sleeve 49, the rod 48 carries a bracket supporting a pulley 53. On the top 31 of the supporting:v member of the arm 15 are ears54c which support a pulley 55. A hoistingline 56is connected at one end to the boss 11 from which it passes upwardf tot-he pulley 53, and over the same, and thence downward and over thepulley- 55. The line 56 is provided for raising or lowering the supporting: member of the arm 15 on the standard 21 VVhensaid member passes onto the sleeve- 19 andreaches the abutment.

50, a continued pull on the line 56=causesthe sleeve to slidenp on" the rod lS, and when the locking pin 51 is entirely withdrawn from the aperture in the standard 521, thesleeve is released and may be rotated on the rod 48, so that: the guard 13-1and its arm: 15

may be now swung sidewise,. entirely clear:

The spring 38 serves tohold.

of the table 10. The guard may also be swung down alongside the table 10 to leave the latter entirely clear, by removing the bo1t28. This releases the clamping mem- 1: her and enables the standard '21., and all the partscarried thereby to be swungdown,

the pivots 23 permitting this. The apertures in the bracket 18 and the table 10 through which the bolt 28 passes, have diametrically opposite key-ways 57 to accommodate the key 2 9. quarter turn: of the bolt 28 brings the liey-in 'line withthe key-ways, after-which the bolt may be removed. The arcu'ate' slot 27 enables the standard 21 to be rotated toturn theguard in any direction across the table. 10",. within the limits of the slot, after loosening the side screw 24,. so that, the gfiard may be properly positioned: relativev to the cutterhead 11.

It will be evident from the foregoing that the guard has a wide range ofadjustment, and itca-n also be quickly swung clean of the table or replaced in operative position The manner of attachment is such that the guard can-be readily applied to the ma.- chine without: any alteration orchangein the structure of'the latter;

The preferred embodiments, of the invention has been shown, but it is todoe understood that various changesin the structural details may be made without a departure from the spirit. and scopeof the invention.

I claim: 1. The combination with awork-table and a cutter of a supportmounted adjacent to the edge of: thetable,v a member pivoted to said support, a standard carried by said member and rotatable therein, means. for

holding the standard against-rotation, a. cutter-guard, a: support for the cutter-guard mounted on. the standard, a slotted. member carried by the standard, and aclampingsbolt passing through the table and the? slot of a said member.

2; The combination-with a WOlFkrtitblB" and a cutter of a, support mounted adjacent to thesedge of thetable, a member pivoted to said support, a standard carried by said rmemberand rotatable therein, means for 1 holding thestandard: against rotatioma cutter-guard, a.- suppo-rt' for the cutter-guard mounted on the standard, and means for looking the standard in upright position,

:said means having: adjustable fastening 1 to p ermit rotation of" theastandard;

3. The-combination with: a .WOTkTtfl/bl'? and .a cutter of a support-mounted adjacent to 'the edge of the-table, a. memhen pivotedto said support, a standard carried by said member and: rotatable therein, means; for

holding the standard againstrotatioma cutand a fastening means passing through the slot and the work-table.

4. The combination of a standard, a cutter-guard, a support for said guard slidably and non-rotatably mounted on the standard, and a rotatable member carried by the stand ard onto which member the aforesaid support is movable.

5. The combination of a standard, a cutter-guard, a support for said guard slidably and non-rotatably mounted in the standard, a rotatable and slidable member carried by the standard onto which member the aforesaid support is movable, means for locking the member, and an abutment on the member engageable by the support for sliding said member to release the same.

6. The combination of a standard, a cutter-guard, a support for said guard slidably and non-rotatably mounted on the standard, a rod rising from the standard, a sleeve slidable and rotatable on the rod onto which sleeve the support is movable, and an abutment and a pin on the sleeve, said pin enter: ing an aperture in the standard for locking the sleeve against rotation, and the abutment being engageable by the, support to slide the sleeve and disengage the pin to release the sleeve.

7. The combination of a standard, a cut jamming the same against the standard, an arm extending from the cam, a fork mounted on the support, a rod connectedto the arm and supported by the fork, and a member screwed on the rod against the fork.

8. The combination of a support having spaced top and bottom portions, an arm having a slotted portion located between the top and bottom portions of the support, a cutter-guard carried by the arm, a plate mounted on the slotted portion of the arm, a bolt passing through the slot of the arm and the bottom portion of the support, and engageable with the plate, and a standard on which the support is mounted, said standard passing through the slot of the arm.

9. The combination of a support having spaced top and bottom portions, an arm having a slotted port-ion located between the top and bottom portions of the support, a cutter-guard carried by the arm, a plate mounted on the slotted portion of the arm, a bolt passing through the slot of the arm and the bottom portion of the support and engageable with the plate, a spring coiled around the bolt between the plate and the bottom portion of the'support, and a standard on which the support is mounted, said standard passing through the slot of the arm.

In testimony whereof I aflix my signature in presence of two witnesses.

PETER ERICKSON.

Witnesses:

Rose M. MINWEGEN, S. J. LEHRER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

